running servers spams a message repeatedly

at pm.a(SourceFile:44) ~[minecraft_server.1.8.1.jar:?]
at pm.b(SourceFile:54) ~[minecraft_server.1.8.1.jar:?]
at pm.a(SourceFile:44) ~[minecraft_server.1.8.1.jar:?]
at pm.b(SourceFile:54) ~[minecraft_server.1.8.1.jar:?]
[17:24:10 INFO]: Generating new properties file
[17:24:10 WARN]: Failed to save server.properties
java.io.FileNotFoundException: server.properties (Access is denied)
at java.io.FileOutputStream.open(Native Method) ~[?:1.8.0_31]
at java.io.FileOutputStream.<init>(Unknown Source) ~[?:1.8.0_31]
at java.io.FileOutputStream.<init>(Unknown Source) ~[?:1.8.0_31]
at pm.b(SourceFile:50) ~[minecraft_server.1.8.1.jar:?]
at pm.a(SourceFile:44) ~[minecraft_server.1.8.1.jar:?]
at pm.b(SourceFile:54) ~[minecraft_server.1.8.1.jar:?]
at pm.a(SourceFile:44) ~[minecraft_server.1.8.1.jar:?]
at pm.b(SourceFile:54) ~[minecraft_server.1.8.1.jar:?]
at pm.a(SourceFile:44) ~[minecraft_server.1.8.1.jar:?]